The 3Delight Principled material is our interpretation of Disney's Principled BRDF (see References). Quoting from the main reference, a principled material adhere to these principles:
- Intuitive rather than physical parameters should be used.
- There should be as few parameters as possible.
- Parameters should be zero to one over their plausible range.
- Parameters should be allowed to be pushed beyond their plausible range where it makes sense.
- All combinations of parameters should be as robust and plausible as possible. We thoroughly debated the addition of each parameter. In the end we ended up
Coating |
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Coating is an important part of a car paint as it affects the overall look in three main aspects:
- It provides a richer specular response to light as it adds a specular highlight on top of the base surface's highlight.
- It can colour light as it passes through the coating.
- It contains metallic particles (a.k.a flakes) suspended inside the coat.
→ Thickness
The thickness of the coating layer. The thicker the layer the more it absorbs light and the less of the base layer is visible. A thickness of 0 disables the coating
→ Specular Level
How "shiny" is the coating. A value of 1 means a very shiny coating.
→ Color
The colouring producing by this coating layer. Colouring will be more prominent in thicker layers.
→ Roughness
Roughness of the coating layer.
Base Layer |
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→ Color
→ Transparency
→ Roughness
→ Specular Level
→ Metallic
→ Anisotropy
Base Layer - Subsurface Color |
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→ Subsurface
→ Color
→ Scale
→ IOR
Base Layer - Incandescence |
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→ Color
Colour of the emitted light.
→ Intensity
Intensity of emitted light. Final colour is Colour * Intensity.
Normal Map / Bump |
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* References
- Physically-Based Shading at Disney by Brent Burley, Walt Disney Animation Studios.